Exhaust-nozzle.



No. 659,791. Patented Oct. I6, |900. E. DEATHERAGE.

EXHAUST NOZZLE.

(Application led Nov. 28, 1899.)

2 Sheets-Sheet l (N0 Model.)

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No. 659,791. Patented out. I6, |900. E. DEATHERAGE.`

EXHAUST NOZZLE.

(Application filed Nov, 2B, 1899.)

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UNrrnD STATES i FFICE.

PATENT EDA DEATHERAGE, OF RIO, ILLINOIS.

SPECIFICATION forming part of Letters Patent No. 659,791, dated October16, 1900.

Application iiledNovemlier 28, 1899. Serial No. 738,605. iNo model.)

To @ZZ wil/077?, it may concern/.-

Be it known that I, EDA DEATHERAGE, a citizen of the United States,residing at Rio, in the county of Knox and State of Illinois, haveinvented certain new and useful Improvements in Exhaust-Nozzles, ofwhich the followingis a specification.

My invention relates to certain new and useful improvements in exhaustnozzles which are adapted for use on all steam-engines employing theexhaust-steam to assist the draft, such as locomotive, traction, andother engines.

The prime object of this invention is to provide an exhaust-nozzle whosesteam-escape opening is automatically regulated as to its area accordingto the pressure of the steam, so that the discharge-opening will bereduced in area as the pressure decreases, and vice versa, and extremechanges of the draft Will thereby be avoided.

Another object of the invention is to provide an artificial draft for anengine which will conform to the various conditions requiring draft-forexample, providing for the free escape of the exhaust-steam While theengine is at heavy work, and thereby increasing the power of the engine.

Other objects of my invention are to provide an automatic valve for anexhaust-nozzle which is freely and quickly adjusted by the escapingsteam to vary the size of the opening in the nozzle, to provide a simpleand inexpensive construction for nozzles of this character, and toconstruct the parts in such a manner that they are not liable to get outof order.

With these and other obj ects in view my invention consists of thepeculiar construction and arrangement of .parts hereinafter describedand shown in the accompanying drawings, in which- Figure 1 is asectional elevation of my improved exhaust-nozzle- Fig. 2 is a bottomplan view of the nozzle. Fig. 3 isasectional elevation showing` myimproved nozzle with the valve provided With wings. Fig. i is a bottomplan view of the nozzle shown in Fig. 3. Fig. 5 is a bottom plan View ofthe valve shown in Fig. 3. Fig. 6 is a sectional View illustrating themanner in which the nozzle may be arranged in a smoke-stack. Fig. 7

shows another manner of constructing the Wings on the valve. Fig.8 is atop plan view of the valve shown in Fig. 7.

Referring to the drawings, in which like letters of reference denotecorresponding parts in all of the iigures, A designates the body of myimproved nozzle, and it is provided with an interior thread a at itslower end, by means of which it can be attached to the exhaust-pipe oriianges, or other means may be provided for this purpose, as desired. Aspider B is arranged in the lower portion of the body and forms a bridgein which the guide O is secured by means of a lock-nut e. This guide isprovided With a coarse thread D, extending substantially throughout itslength, and a valve E is arranged on this guide and provided with aninterior thread in its central opening e, which corresponds in its pitchwith that of the thread D on the guide. lhe pitch of the threads must besuch that the valve Will descend by gravity as the pressure of theescaping steam diminishes, and when the pressure of steam increases thevalve will respond quickly and freely and rise accordingly. The upperend of the valve is provided With an extension F to receive the cap G,which is secured thereon to protect the upper end of the guide frominjury and soot.

The valve is preferably conical in shape, as

shown in Fig. l, and the upper end of the body may be flared to form aseat d, so that when the valve is in its lowest position a passage-waywill always be maintained for the escape of some steam. The workingparts are lubricated by the oily steam passing around the guide andthrough the valve to the cap, and to limit the upward movement of thevalve I provide a key g. It will thus be observed that the valve beingin its lowest position, as indicated in dotted lines in Fig...1, thepressure of steam thereon being increased will cause the valve to rise,a'nd this rising of the valve will be governed entirely and regulated inaccordance With the amount of pressure exerted by the escaping steam, sothat as the pressure increases the valve will be raised higher to permitof the proper escape of steam, and this enlargement 0f theescape-opening for the steam will correspond to the demands of theengine for an increased draft, all of which is accomplished automat- IOOically and by the pressure of the escaping steam. The object of therevoluble movement which is communicated to the valve as it is actedupon by the steam and caused by the manner in which it is mounted uponthe guide is to retard this movement of the valve, and particularly atintervals between the slowand heavy exhausts. I have found, however,that while the valve, as hereinbefore described and shown in Fig. 1, maybe suitable for some purposes in order to avoid making a valve ofconsiderable size and weight it is desirable to provide other devicesfor retarding the movement of the valve and in this Way accomplishingthe same result as would be had by a valve of greater size and Weight. Ihave therefore shown in Figs. 3 and 7 two different constructions whichmay be embodied with the general form of valve shown in Fig. l and WhichI will no1 describe. Referring to Fig. 3, the conical valve is providedwith wings around its sides, and these wings are inclined and disposedin such a'manner that the pressure of the escaping steam exerted againstthem will tend to screw the valve down to its seat, while the directpressure of the escaping steam on the valve itself tends to raise thevalve from its seat, and as the area of the valve-body is greater thanthe combined area of the Wings the force of the escaping steam willraise the valve a sufficient distance to permit the steam to escapefreely therefrom, and as the pressure of the steam diminishes the valvewill descend. The wings (shown in Fig. 3) are made in the form ofblades, which are attached to the valve in a suitable manner, but thesewings may be made as shown in Fig. 7 by cutting or grooving the body ofthe valve. It will therefore be observed that instead of increasing thesize and weight of the valve, as would be necessary to provide for theproper regulation thereof under heavy exhausts, I accompl'ish the sameresult by employing devices for retarding the movement of the valve, andthese devices are embodied with the valve in such a manner that theyoperate in a highly-satisfactory manner to accomplish the desiredresults. l, Instead of securing the cap G on a projection F of thevalve, as shown in Fig. 1, I may screw this cap into a recess I in theupper end of the valve, as shown in Fig. 3, and also provide aguide-plate J for the guide C. While I have described my invention asparticularly adapted as a steam-exhaust nozzle, it will be understoodthat I reserve the right to use it in all other connections and withother fluids wherever it may be practicable. It is also important thatas the steam escapes from the nozzle it is distributed in such a manneras to produce a lnore effective draft than would be the case if itescaped therefrom in a solid body.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

l. In a steam-exhaust nozzle, the combination with the body and a guideconnected therewith, of a valve mounted on the guide, said valve beingso constructed and arranged as to be operated vertically and revolublyby the escaping steam.

2. In a steam-exhaust nozzle, the combination with a body and aspirallythreaded guide, of a valve adapted to be moved vertically andrevolubly on the guide by the escaping steam to vary the escapeopening,substantially as described.

3. In a steam-exhaust nozzle, the combination with a body and a guide,of a valve adapted to be adjusted vertically on the guide by theescaping steam and means for imparting a revoluble movement to the valvecoincident with its adjustment on the guide.

4L. In a steam-exhaust nozzle, the combination of a body, a guidemounted therein and provided with a spiral thread and a valve mounted onthe body and provided with a thread to' receive the thread of the guide,whereby the valve is vertically and revolubly adjusted by the escapingsteam, substantially as and for the purpose described.

5. In a steam-exhaust nozzle, the combination with a body, of aspirally-threaded guide mounted therein, a valve operating vertically onsaid guide and a cap carried bythe valve to receive the upper end of theguide, substantially as described.

- 6. A steam-exhaust nozzle provided with a spirally-th-readed guidemounted therein and having a spirally-threaded valve provided withexterior wings, said wings being disposed around the valve so that thepressure of the escaping steam thereon will retard the upward movementof the valve.

'7. In a steam-exhaust nozzle, the combination with a body, of a guidemounted therein and provided with a spiral thread, a valve operating onthe guide and wings on said valve, substantially as and for the purposedescribed.

EDA DEATHERAGE.

Witnesses:

MILTON DEATHERAGE, OSCAR F. SEXToN.

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